Unicompartmental customized arthroplasty cutting jigs

Abstract

Disclosed herein are unicompartmental femoral and tibial arthroplasty jigs for respectively assisting in the performance of unicompartmental femoral and tibial arthroplasty procedures on femoral and tibial arthroplasty target regions. The femoral and tibial unicompartmental arthroplasty jigs each include a first side, a second side and a mating surface. Each second side is generally opposite its respective first side. For the femoral jig, the mating surface is in the first side of the femoral jig and configured to matingly receive and contact a generally planar area of an anterior side of a femoral shaft generally proximal of the patellar facet border and generally distal an articularis genu. The first side of the femoral jig is configured to be oriented towards the femoral arthroplasty target region surface when the mating surface of the femoral jig matingly receives and contacts the planar area. For the tibial jig, the mating surface of the tibial jig is in the first side and configured to matingly receive and contact a generally planar area of an anterior side of a tibial shaft distal of the tibial plateau edge and generally proximal of the tibial tuberosity. The first side of the tibial jig is configured to be oriented towards the tibial arthroplasty target region surface when the mating surface of the tibial jig matingly receives and contacts the planar area.

What is claimed is: 
     
       1. A femoral arthroplasty jig for assisting in the performance of a femoral arthroplasty procedure on a femoral arthroplasty target region, the jig comprising:
 a mating surface including a customized surface contour that is generally a negative of certain surfaces of the femoral arthroplasty target region, the mating surface configured to matingly receive and contact the certain surfaces of the femoral arthroplasty target region, the certain surfaces being limited to and including a medial articular condyle surface, an articular trochlear groove surface, and a generally planar area between an articularis genu and a patellar facet border of an anterior side of a femoral shaft. 
 
     
     
       2. The femoral arthroplasty jig of  claim 1 , further comprising a cutting guide surface positioned and oriented relative to the mating surface to result in a cut in the femoral arthroplasty target region with a desired position and orientation. 
     
     
       3. The femoral arthroplasty jig of  claim 2 , wherein the desired position and orientation allows a prosthetic femoral implant to restore a patient's knee joint to a natural alignment. 
     
     
       4. The femoral arthroplasty jig of  claim 2 , further comprising a jig body of unitary construction and wherein the cutting guide surface and the mating surface are defined in the jig body. 
     
     
       5. The femoral arthroplasty jig of  claim 1 , wherein the jig is a unicompartmental femoral arthroplasty jig configured for assisting in the performance of a unicompartmental femoral arthroplasty procedure. 
     
     
       6. The femoral arthroplasty jig of  claim 1 , wherein the medial articular condyle surface is limited to anterior and distal regions of the medial articular condyle surface. 
     
     
       7. The femoral arthroplasty jig of  claim 1 , wherein the articular trochlear groove surface is limited to anterior and distal regions of a medial articular trochlear groove surface. 
     
     
       8. The femoral arthroplasty jig of  claim 1 , wherein the articular trochlear groove surface is limited to regions of a lateral articular trochlear groove surface and a medial articular trochlear groove surface. 
     
     
       9. The femoral arthroplasty jig of  claim 1 , wherein the articular trochlear groove surface is limited to anterior and distal regions of a lateral articular trochlear groove surface and anterior and distal regions of a medial articular trochlear groove surface. 
     
     
       10. The femoral arthroplasty jig of  claim 1 , wherein the generally planar area of the anterior side of the femoral shaft is limited to being generally distal of the articularis genu and generally proximal of the anterior patellar facet border. 
     
     
       11. The femoral arthroplasty jig of  claim 1 , wherein the generally planar area of the anterior side of the femoral shaft is limited to: being generally distal of the articularis genu and generally proximal of the anterior patellar facet border; and at least one contact point with the anterior patellar facet border. 
     
     
       12. A femoral arthroplasty jig for assisting in the performance of a femoral arthroplasty procedure on a femoral arthroplasty target region, the jig comprising:
 a mating surface including a customized surface contour configured to matingly receive and contact a generally planar area of an anterior side of a femoral shaft generally proximal of the patellar facet border and generally distal an articularis genu, 
 wherein the customized surface contour of the mating surface is generally an identical negative shape of the generally planar area of the anterior side of the femoral shaft generally proximal of the patellar facet border and generally distal the articularis genu. 
 
     
     
       13. The femoral arthroplasty jig of  claim 12 , further comprising a cutting guide surface positioned and oriented relative to the mating surface to result in a cut in the femoral arthroplasty target region with a desired position and orientation. 
     
     
       14. The femoral arthroplasty jig of  claim 13 , wherein the desired position and orientation allows a prosthetic femoral implant to restore a patient's knee joint to a natural alignment. 
     
     
       15. The femoral arthroplasty jig of  claim 13 , further comprising a jig body of unitary construction and wherein the cutting guide surface and the mating surface are defined in the jig body. 
     
     
       16. The femoral arthroplasty jig of  claim 12 , wherein the jig is a unicompartmental femoral arthroplasty jig configured for assisting in the performance of a unicompartmental femoral arthroplasty procedure. 
     
     
       17. A femoral arthroplasty jig for assisting in the performance of a femoral arthroplasty procedure on an arthroplasty target region of a femur of a patient's knee joint, the femur including a medial articular condyle surface, an articular trochlear groove surface, and a generally planar area between an articularis genu and a patellar facet border of an anterior side of a femoral shaft, the medial articular condyle surface including an anterior region and a distal region, the articular trochlear groove surface including a lateral articular trochlear groove surface with anterior and distal regions, and a medial articular trochlear groove surface with anterior and distal regions, the femoral arthroplasty procedure being associated with an implantation of a prosthetic femoral implant, the jig comprising:
 a mating surface including a customized surface contour that is generally a negative of the medial articular condyle surface, the articular trochlear groove surface, and the generally planar area between the articularis genu and the patellar facet border of the anterior side of the femoral shaft, 
 wherein the mating surface is configured to make contact with the femur that includes, and is limited to, contact with the medial articular condyle surface, the articular trochlear groove surface, and the generally planar area between the articularis genu and the patellar facet border of the anterior side of the femoral shaft when the jig is applied to the femur to perform the femoral arthroplasty procedure on the arthroplasty target region. 
 
     
     
       18. The femoral arthroplasty jig of  claim 17 , further comprising a cutting guide surface positioned and oriented relative to the mating surface to result in a cut in the arthroplasty target region with a desired position and orientation. 
     
     
       19. The femoral arthroplasty jig of  claim 18 , wherein the desired position and orientation allows the prosthetic femoral implant to restore the patient's knee joint to a natural alignment. 
     
     
       20. The femoral arthroplasty jig of  claim 18 , further comprising a jig body of unitary construction and wherein the cutting guide surface and the mating surface are defined in the jig body. 
     
     
       21. The femoral arthroplasty jig of  claim 17 , wherein the contact with the medial articular condyle surface is limited to the anterior and distal regions of the medial articular condyle surface. 
     
     
       22. The femoral arthroplasty jig of  claim 17 , wherein the contact with the articular trochlear groove surface is limited to the anterior and distal regions of the medial articular trochlear groove surface. 
     
     
       23. The femoral arthroplasty jig of  claim 17 , wherein the contact with the articular trochlear groove surface is limited to regions of the lateral articular trochlear groove surface and the medial articular trochlear groove surface. 
     
     
       24. The femoral arthroplasty jig of  claim 17 , wherein the contact with the articular trochlear groove surface is limited to the anterior and distal regions of the lateral articular trochlear groove surface and the anterior and distal regions of the medial articular trochlear groove surface. 
     
     
       25. The femoral arthroplasty jig of  claim 17 , wherein the contact with the generally planar area of the anterior side of the femoral shaft is limited to being generally distal of the articularis genu and generally proximal of the anterior patellar facet border. 
     
     
       26. The femoral arthroplasty jig of  claim 17 , wherein the contact with the generally planar area of the anterior side of the femoral shaft is limited to: being generally distal of the articularis genu and generally proximal of the anterior patellar facet border; and at least one contact point with the anterior patellar facet border. 
     
     
       27. The femoral arthroplasty jig of  claim 17 , wherein the jig is a unicompartmental femoral arthroplasty jig configured for assisting in the performance of a unicompartmental femoral arthroplasty procedure. 
     
     
       28. A femoral arthroplasty jig for assisting in the performance of a femoral arthroplasty procedure on an arthroplasty target region of a femur of a patient's knee joint, the femur including a generally planar area of an anterior side of a femoral shaft generally proximal of a patellar facet border and generally distal an articularis genu, the femoral arthroplasty procedure being associated with an implantation of a prosthetic femoral implant, the jig comprising:
 a mating surface including a customized surface contour that is generally a negative of the generally planar area of the anterior side of the femoral shaft generally proximal of the patellar facet border and generally distal the articularis genu, 
 wherein the mating surface is configured to make femur contact that includes contact with the generally planar area of the anterior side of the femoral shaft generally proximal of the patellar facet border and generally distal the articularis genu when the jig is applied to the femur to perform the femoral arthroplasty procedure on the arthroplasty target region. 
 
     
     
       29. The femoral arthroplasty jig of  claim 28 , further comprising a cutting guide surface positioned and oriented relative to the mating surface to result in a cut in the arthroplasty target region with a desired position and orientation. 
     
     
       30. The femoral arthroplasty jig of  claim 29 , wherein the desired position and orientation allows the prosthetic femoral implant to restore the patient's knee joint to a natural alignment. 
     
     
       31. The femoral arthroplasty jig of  claim 29 , further comprising a jig body of unitary construction and wherein the cutting guide surface and the mating surface are defined in the jig body. 
     
     
       32. The femoral arthroplasty jig of  claim 28 , wherein the jig is a unicompartmental femoral arthroplasty jig configured for assisting in the performance of a unicompartmental femoral arthroplasty procedure.